TY  - RPRT
TI  - Reports and maps of the Geological Survey released only in the open files, 1967
AU  - Betsy A. Weld
AU  - Margaret S. Griffin
AU  - George W. Brett
PY  - 1968
DO  - 10.3133/cir548
UR  - https://pubs.usgs.gov/publication/cir548
ID  - cir548
ER  -